Gold extracting medicament and gold extracting process using the gold extracting medicament

A pharmaceutical and process technology, applied in the field of hydrometallurgy, can solve the problems of low gold recovery rate, large consumption of pharmaceuticals, imperfect subsequent process of leaching, etc., and achieve the effects of high activity, low toxicity, and rapid and efficient reaction.

Active Publication Date: 2021-05-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, the existing wet process includes thiourea method, thiosulfate method, halogenation method, lime sulfur method and other leaching processes, or there are insufficient environmental protection, or the chemical consumption is too large, or the subsequent leaching process is not enough. Perfect, low gold recovery

Method used

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  • Gold extracting medicament and gold extracting process using the gold extracting medicament
  • Gold extracting medicament and gold extracting process using the gold extracting medicament
  • Gold extracting medicament and gold extracting process using the gold extracting medicament

Examples

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Effect test

Embodiment 1～6

[0060] Embodiments 1 to 6 of the present invention provide six groups of ore samples of different types and properties as gold-bearing materials in wet gold extraction experiments. The specific operations are as follows:

[0061] (1) Ore breaking: each group of gold-bearing materials is fully crushed in the two-stage crushing and two-stage screening closed-circuit crushing system composed of jaw crusher, double-roller crusher and 2mm sieve. After screening, the materials larger than 2mm are returned The roller crusher continues to crush, and the material smaller than 2mm is used as grinding material.

[0062] (2) Grinding: After the ore is broken, feed the material less than 2mm obtained in step (1) into a roller ball mill for grinding, and set the ball milling time according to the occurrence state of gold in different minerals and the fragility of the minerals. Grind until the particle size composition is less than 200 mesh (less than 0.074mm) accounting for more than 95%. ...

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Abstract

A gold extraction agent and a gold extraction process using the gold extraction agent relate to the field of hydrometallurgy. The gold extracting agent comprises the following raw material components in parts by mass: 5-30 parts of leaching agent and 4-10 parts of leaching aid; wherein, the leaching agent includes halogenated five-membered cyclic imine, five-membered ring imide, cyanoacetamide and trichloroisocyanuric acid in one or more combinations; the soaking aids include KI, NaI, KBr, NaBr, NaCl, KCl, EDTA‑2Na, Na 2 CO 3 , CaCO 3 and one or more combinations of talcum powder. The gold extraction agent provided by the invention slowly releases halogens and various strong oxidizing free radicals during the reaction, has high activity, reacts quickly and efficiently to oxidize gold, and forms stable gold ions in the presence of extraction agents and leaching aids. Compared with cyanide, thiourea, chlorine and bromine and other gold leaching reagents, it is non-toxic or extremely low toxicity, so that the gold leaching rate can reach more than 90%.

Description

technical field [0001] The present invention relates to the full hydrometallurgy extraction technology of precious metals in the field of hydrometallurgy, in particular to a gold extraction agent and a gold extraction process using the gold extraction agent, which is environmentally friendly, economical, and economical from gold-containing minerals and gold-containing electronic waste. Extract gold efficiently. Background technique [0002] Gold is one of the rare and precious metals, an important strategic resource, and a currency reserve resource. At the same time, as an important industrial raw material, gold has important applications in jewelry industry, medical treatment, electronic industry, modern communication, aerospace industry and other departments. [0003] At present, my country's gold industry is mainly produced by cyanidation. The cyanidation method uses cyanide, such as an aqueous solution of sodium cyanide and potassium cyanide, to dissolve the natural go...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B1/00C22B11/00
CPCC22B1/00C22B3/04C22B11/04Y02P10/20
Inventor 陈运法刘翔王永良叶树峰肖力
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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